Recently, we have developed a localized adaptive waveform inversion method (LAWI) to tackle the cycle-skipping issue in velocity reconstruction by waveform inversion. In LAWI, the Gabor deconvolution is applied to compute a local matching filter, whose centroid time is used for measuring the instantaneous time shift between observed and calculated data. Different from AWI which is based on a stationary convolutional model, LAWI can take the non-stationarity nature of seismic data into account, therefore performing better in handling realistic cycle skipping problems. Numerical tests show that, compared with AWI, the application of LAWI seems to require a higher signal-to- noise ratio (SNR) of observed data. To make LAWI work for low-SNR data, a delta-type regularization is developed to deal with the noise problems inherent in the Gabor deconvolution. Despite a slight resolution loss and a “layer-stripping principle break” induced by this new regularization illustrated numerically, we present how this method can be useful to invert low-SNR data on the Chevron benchmark dataset.
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SEG/AAPG International Meeting for Applied Geoscience & Energy
August 28–September 1, 2022
Houston, Texas, USA
Robust localized adaptive waveform inversion: A new regularization for Gabor deconvolution
Romain Brossier;
Romain Brossier
University Grenoble Alpes
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Ludovic Métivier
Ludovic Métivier
University Grenoble Alpes
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Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, USA, August 2022.
Paper Number:
SEG-2022-3745694
Published:
November 01 2022
Citation
Yong, Peng, Brossier, Romain, and Ludovic Métivier. "Robust localized adaptive waveform inversion: A new regularization for Gabor deconvolution." Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, USA, August 2022. doi: https://doi.org/10.1190/image2022-3745694.1
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